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| All Small Parts (205) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | 231781 | 231781 Driveshaft Nut — 5/8-18 Thread, 0.937″ HexThe 231781 is a light-duty… Show more (+) 231781 Driveshaft Nut — 5/8-18 Thread, 0.937″ HexThe 231781 is a light-duty driveshaft fastener at 5/8-18 UNF thread with a 0.937-inch (approximately 15/16″) hex. This size is found on U-bolt hardware, companion flange bolts on smaller axle applications, and driveshaft hardware in the 1210-1310 series range where torque requirements are moderate.SKU231781Thread0.625-18 UNF (5/8-18)Hex0.937″ (~15/16″)Thickness0.437″Cross-referenceSpicer 231781When replacing U-bolt nuts on driveshafts, always replace as a set — four nuts from the same batch ensures consistent thread engagement and clamp load across all four positions. Using two old and two new nuts introduces uneven clamping that tilts the bearing cap and causes premature U-joint wear. Show less (-) | Hex: 937 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | 24-74-21 | The 24-74-21 uses a 1.500-18 UNF thread — the largest inch-thread standard… Show more (+) The 24-74-21 uses a 1.500-18 UNF thread — the largest inch-thread standard typically found in driveshaft hardware. The 2.197-inch hex (roughly 2-3/16 inch) requires a large socket and adequate torque — this nut size is used on heavy-duty American truck axle and transmission output shaft applications where substantial preload is required.SpecValueSKU24-74-21Thread1.500-18 UNFHex2.197″Thickness0.625″A nut at 1.500-18 thread is used on the largest Spicer slip yoke applications and some companion flange retaining positions on Class 6-8 trucks. Verify the correct torque specification — at this thread size, the specification may be as high as 400-600 ft-lb. Use a calibrated torque multiplier for repeatable results. Show less (-) | Hex: 2.197 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | 250-74-11 | 250-74-11 Metric Driveshaft Nut — M30 x 2 ThreadM30 x 2 is… Show more (+) 250-74-11 Metric Driveshaft Nut — M30 x 2 ThreadM30 x 2 is a medium-heavy metric thread pitch used on heavier-duty applications than the M20 range. The 2mm pitch (vs. 1.5mm on M20 fine thread) indicates this is a coarser thread application — typical of European medium-duty truck axle and driveshaft fasteners where coarse thread provides more thread height per engagement length.SKU250-74-11ThreadM30 x 2.0Hex1.575″ (40mm)Thickness0.63″ (16mm)The 1.575-inch (40mm) hex requires a 40mm socket — verify socket size before attempting installation. In tight spaces around differential housings, a crowfoot socket adapter may be necessary for final torquing. Do not use open-end wrenches on final torque applications at this thread size. Show less (-) | Hex: 1.575 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | 2774-782 | The 2774-782 is specifically noted as a BMW carrier bearing nut. BMW… Show more (+) The 2774-782 is specifically noted as a BMW carrier bearing nut. BMW uses unique nut profiles at their center bearing retaining positions — the M18 thread and 0.52-inch thickness are BMW-specific, and a generic M18 nut will not have the correct underhead bearing face geometry to properly retain the carrier bearing bracket.SKU: 2774-782Application: BMW (carrier bearing retention)Thread: M18Thickness: 0.52″BMW driveshaft center bearing service is complicated by the heat-treated nut — BMW specifies replacement of the nut at every service to maintain correct clamping force. Reusing the 2774-782 risks under-clamping the bearing bracket, which allows the bearing to shift under load and creates a speed-dependent vibration that varies with driveshaft torque direction. Show less (-) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | 350-74-23806 | 350-74-23806 Heavy-Duty Nut — M36 x 1.5 Metric ThreadM36 x 1.5 is… Show more (+) 350-74-23806 Heavy-Duty Nut — M36 x 1.5 Metric ThreadM36 x 1.5 is a large metric fine thread, found on heavy commercial truck driveshaft and axle hardware where the fastener must handle substantial clamping loads. The 2.165-inch hex (55mm) and 0.866-inch (22mm) thickness indicate this nut is for a primary retention point — pinion nut, stub shaft retainer, or heavy companion flange fastener on Class 7-8 trucks.SpecValueSKU350-74-23806ThreadM36 x 1.5 metric fineHex2.165″ (55mm)Thickness0.866″ (22mm)At M36 thread size, impact installation is acceptable but final torque must use a calibrated torque wrench. Pinion nuts at this size can require 300-500 Nm of torque — verify against the axle manufacturer’s specification. Over-torquing collapses the crush sleeve (if applicable) or distorts the bearing pre-load, requiring carrier disassembly to correct. Show less (-) | Hex: 2.165 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| | 5007770 | The 5007770 uses M20 x 1.5 metric fine thread — the metric… Show more (+) The 5007770 uses M20 x 1.5 metric fine thread — the metric equivalent of the 1.250-18 UNF inch thread used on North American driveshaft hardware. The M20 x 1.5 thread is common on European commercial truck and van driveshaft components, and on metric-thread axle pinion nuts in imported vehicles. Using an inch-thread nut on a metric shaft (or vice versa) will cross-thread within the first few turns — do not force.SKU5007770ThreadM20 x 1.5 (metric fine)Hex1.174″Thickness0.585″Torque specification for M20 x 1.5 nuts varies by application — use the vehicle or component manufacturer’s specification rather than a generic torque chart. The thread pitch (1.5mm) provides good vibration resistance in the driveshaft environment without requiring a prevailing-torque design in many applications. Show less (-) | Hex: 1.174 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | 858018 | 858018 — 5/8-18 UNF Driveshaft Hardware Nut For smaller-format driveshaft retaining… Show more (+) 858018 — 5/8-18 UNF Driveshaft Hardware Nut For smaller-format driveshaft retaining and fastener applications using 5/8-18 fine thread.The 858018 nut with 5/8-18 UNF thread is used in driveshaft hardware applications where a fine-thread fastener provides more positive retention than a coarse thread. Fine threads have more threads per inch, which provides greater contact area per unit of thread engagement and higher resistance to vibration loosening. The 0.658-inch thickness gives this nut adequate bearing face area for the clamping loads involved.SKU: 858018Thread: 5/8-18 UNFHex: 6-inch (note: verify this is the correct wrench size for your application)Thickness: 0.658″ Show less (-) | Hex: 6 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | N16-74-101 | The N16-74-101 uses a 1.00-20 UNF thread — a smaller thread than… Show more (+) The N16-74-101 uses a 1.00-20 UNF thread — a smaller thread than the 1.250-18 used on heavier slip yoke applications. This nut is used on lighter-duty transmission output shafts found in passenger cars, light vans, and mid-size trucks. The 1.312-inch hex is proportionally smaller than the 1.625-inch hex on the 1.250-18 family — do not attempt to use the larger 1.625 hex socket on this nut.SKUN16-74-101Thread1.00-20 UNFHex1.312″Thickness0.562″Cross-reference: 16-74-101. When sourcing a replacement, confirm both thread size and hex size — a 1.00-20 thread nut with the wrong hex (1.250-18 hex nut on a 1.00-20 shaft) will strip the smaller shaft threads before reaching the correct torque. Show less (-) | Hex: 1.312 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | N20-74-91 | N20-74-91 Driveshaft Retaining Nut — 1.250-18 ThreadThe N20-74-91 is a standard hex… Show more (+) N20-74-91 Driveshaft Retaining Nut — 1.250-18 ThreadThe N20-74-91 is a standard hex nut for slip yoke retention, sharing the 1.250-18 thread and 1.625-inch hex with the 231502 family. The different part number designates a different sourcing or specification origin while maintaining dimensional compatibility. Verify thread engagement by threading the nut onto the shaft by hand before using a wrench — any resistance at the start of engagement suggests thread damage on either the shaft or the nut.SpecValueSKUN20-74-91Thread1.250-18 UNFHex1.625″Thickness0.625″Torque to the transmission manufacturer’s specification. Overtorquing a retaining nut on a slip yoke can distort the yoke bore, reducing the clearance of the U-joint caps and preventing proper articulation. Under-torquing allows the yoke to move axially on the output shaft, wearing both the shaft splines and yoke bore. Show less (-) | Hex: 1.625 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | N231502 | The N231502 is the Neapco-series counterpart to the Spicer 231502 nut. Both… Show more (+) The N231502 is the Neapco-series counterpart to the Spicer 231502 nut. Both share the same thread (1.250-18 UNF), hex size (1.625 inches), and thickness (0.625 inch). The N prefix indicates Neapco sourcing — functionally interchangeable with 231502 for standard (non-prevailing-torque) applications.SKU: N231502Thread: 1.250-18 UNFHex: 1.625″Thickness: 0.625″Type: Standard hex nut (no prevailing torque)Cross-reference: Neapco N231502, Spicer 231502For slip yoke applications where vibration loosening is a concern, the prevailing-torque version P231502 is preferred. The N231502 standard nut should be used with a torque spec and, if required, a cotter pin or additional locking feature per the transmission manufacturer’s service procedure. Show less (-) | Hex: 1.625 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | P231502 | P231502 — Prevailing-Torque Driveshaft Nut, 1.250-18 ThreadThe P prefix on P231502 indicates… Show more (+) P231502 — Prevailing-Torque Driveshaft Nut, 1.250-18 ThreadThe P prefix on P231502 indicates a prevailing-torque (self-locking) nut — it has a deformed thread or nylon insert that resists backing off under vibration without requiring a cotter pin or lock washer. This is the preferred retaining nut for slip yoke applications where the nut is subject to reversing torque loads. The non-P version (231502) is a standard nut without prevailing torque features.SKUP231502Thread1.250-18 UNFHex size1.625″Thickness0.63″TypePrevailing torqueCross-reference: Spicer P231502. Do not reuse prevailing-torque nuts — the self-locking feature is single-use. Reinstalling a used P231502 loses a significant fraction of its prevailing torque, which may allow the nut to loosen in service. Show less (-) | Hex: 1.625 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | 230123-14 | 230123-14 — Driveshaft Washer, 0.66″ ID x 0.188″ Thick Spicer 230123… Show more (+) 230123-14 — Driveshaft Washer, 0.66″ ID x 0.188″ Thick Spicer 230123 series — for light-series U-joint bearing cup retention.The 0.66-inch inside diameter of the 230123-14 indicates it is used with smaller-series U-joints where the bearing cup pilot is proportionally smaller — consistent with 1210 or small-format custom joint applications. The Spicer 230123 series covers multiple sizes for different bore dimensions; the -14 suffix is the variant for the 0.66-inch bore.When sourcing this washer as part of a U-joint service kit, verify the -14 is the correct size by measuring the bearing cup pilot diameter. The cup pilot should slip-fit through the washer bore with minimal clearance — a loose fit indicates the wrong washer size or a worn cup.SKU: 230123-14ID: 0.66″Thickness: 0.188″Cross-reference: Spicer 230123-14 Show less (-) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | 2715-489 | The 2715-489 and 2715-692 share the same 0.04-inch thickness. The different suffix… Show more (+) The 2715-489 and 2715-692 share the same 0.04-inch thickness. The different suffix numbers indicate different OD or ID dimensions for different U-joint bore sizes — both at 0.04 inch thick, but the 2715-489 is sized for a different bore diameter than the -692. Select based on the bore diameter of the specific U-joint being serviced, not just thickness.SKU2715-489Thickness0.04″Series2715NoteDifferent bore dimensions than 2715-692 despite same thicknessThe 2715 series shims are precision-ground — do not attempt to use a washer or non-precision shim as a substitute. The surface finish and flatness of a precision shim directly affect bearing contact quality at the cup face. A rough or non-flat shim creates uneven contact that concentrates load on a small area of the needle bearing end. Show less (-) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | 2715-692 | 2715-692 — 0.04-Inch Precision ShimAt 0.04 inch (approximately 1mm), the 2715-692 is… Show more (+) 2715-692 — 0.04-Inch Precision ShimAt 0.04 inch (approximately 1mm), the 2715-692 is a thin shim used when the primary shim selection leaves a residual endplay that needs a fine correction. In selective assembly processes for U-joint overhaul, technicians use a primary shim to get close to the endplay target, then add a thin shim like the 2715-692 to fine-tune the final value.SpecValueSKU2715-692Thickness0.04″Series2715Use caseFine endplay correctionNever stack more than two shims in a single bearing cup position — the joint will use a shim pack that is unstable and may compress under load, changing the endplay during operation. If the endplay requires more than two shims, investigate whether the yoke bore has worn beyond acceptable limits. Show less (-) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | 2715-876 | The 2715-876 at 0.106-inch thickness is a precision shim used to set… Show more (+) The 2715-876 at 0.106-inch thickness is a precision shim used to set U-joint bearing cup endplay. The 2715 series covers multiple thicknesses — technicians select the appropriate thickness to achieve the specified endplay range (typically 0.001 to 0.004 inch for most series). Installing a shim that is 0.010 inch too thick causes excessive preload on the needle bearings; 0.010 inch too thin allows the cross to rock, wearing the bearing cup bores.SKU: 2715-876Thickness: 0.106″Series: 2715 (precision shim family)Application: U-joint bearing cup endplay controlSelective assembly note: when replacing a U-joint, measure the existing shim thickness before discarding the old joint. The same thickness is usually correct for the replacement unless the yoke bores show wear that has changed the bore depth. Show less (-) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| | 500357-17 | 500357-17 — Driveshaft Washer, 0.75 ID x 1.25 ODThe 500357-17 and N500357-17… Show more (+) 500357-17 — Driveshaft Washer, 0.75 ID x 1.25 ODThe 500357-17 and N500357-17 share the same dimensional specification (0.75 ID, 1.25 OD, 0.188 thickness) — the N prefix typically indicates a Neapco-sourced component versus a generic or Spicer-sourced equivalent. Both are dimensionally interchangeable for applications where either designation is called out.SKU500357-17Inside diameter0.75″Outside diameter1.25″Thickness0.188″RelatedN500357-17 (Neapco equivalent)These washers are used in light-to-mid series U-joint applications where the 0.75-inch bore corresponds to the bearing cup pilot. Check the original washer thickness with a micrometer before discarding — the actual installed thickness confirms the designed endplay specification for that particular joint. Show less (-) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| | 5007771 | The 5007771 washer at 0.815-inch ID and 1.398-inch OD serves a mid-range… Show more (+) The 5007771 washer at 0.815-inch ID and 1.398-inch OD serves a mid-range U-joint application. The 0.152-inch thickness is a non-standard value between the common 0.125 and 0.188-inch families, indicating this is application-specific hardware for a particular OEM joint series. Do not substitute a 0.125 or 0.188-inch washer — the difference in thickness will either preload the bearing cups or leave excess endplay that allows the cross to move axially.SKU: 5007771ID: 0.815″OD: 1.398″Thickness: 0.152″Always source OEM-equivalent hardware for U-joint service. The snap ring and washer thicknesses are calculated to achieve a specific endplay — typically 0.001 to 0.004 inch — and deviating from the designed thickness pushes the joint outside this range, compromising bearing life. Show less (-) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| | 98-216 | 98-216 — Driveshaft Washer, 1.062 ID x 2.016 ODThe 1.062-inch inside diameter… Show more (+) 98-216 — Driveshaft Washer, 1.062 ID x 2.016 ODThe 1.062-inch inside diameter of the 98-216 correlates with the 1.062-inch cap diameter of 1210, 1310, and 1330 series U-joints. This washer seats against the bearing cup end inside the yoke bore, setting the axial position of the cup before the snap ring is installed. Using the wrong thickness (different from the original 98-216) changes U-joint endplay and needle bearing contact pattern.SpecValueSKU98-216Inside diameter1.062″Outside diameter2.016″Thickness0.125″Series98 (OEM-style)The 98-series numbering indicates OEM-compatible hardware. When servicing a factory-assembled driveshaft, use the same series hardware to maintain the original endplay specification. Show less (-) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | N230123-6 | N230123-6 — Large Series Driveshaft Washer 1.281″ ID x 2.75″ OD… Show more (+) N230123-6 — Large Series Driveshaft Washer 1.281″ ID x 2.75″ OD x 0.125″ thick — for heavy-duty U-joint series retention.The 2.75-inch outside diameter of N230123-6 indicates this washer is used on a large-format U-joint — likely in the 1480, 1550, or larger series where the bearing cap and yoke bore are correspondingly larger. The thinner 0.125-inch thickness (vs. 0.188-inch on smaller washers) may be to accommodate a specific end-play specification at the bearing cup.Do not substitute a thicker washer in place of the N230123-6 — adding 0.063 inch of extra thickness on each side of the U-joint cross creates 0.126 inch of reduced cross endplay, which preloads the needle bearings and causes premature failure.SKU: N230123-6ID: 1.281″OD: 2.75″Thickness: 0.125″ Show less (-) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | N230129 | The N230129 is a driveshaft washer with 0.812-inch inside diameter and 1.75-inch… Show more (+) The N230129 is a driveshaft washer with 0.812-inch inside diameter and 1.75-inch outside diameter. The larger OD compared to lighter-duty snap rings indicates this is used on a larger U-joint series where the bearing cup and yoke bore are proportionally larger. The 0.188-inch thickness is the same as N500357-17, suggesting both are in the same thickness family despite different bore sizes.SKUN230129Inside diameter0.812″Outside diameter1.75″Thickness0.188″Cross-referenceSpicer N230129Verify the correct OD for your yoke bore — a washer that is too large in OD will not seat in the yoke counterbore and will prevent the snap ring from engaging. The washer must sit flush against the bearing cup end before the snap ring is installed. Show less (-) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
