PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

58129BPin,piston

Brinkley Technology Group Llc Dba Hercules Manufacturing · NSN 2805-00-275-3056 · FSC 2805 · No Item Name Available
Verified by PartsTable
NSN 2805-00-275-3056 — this item is cataloged by the U.S. Government under National Stock Number 2805-00-275-3056. Primary manufacturer part number: 58129B.
Features
  • Pin,piston — FSC 2805
  • Outside Diameter: 0.68630 INCHES MINIMUM AND 0.68720 INCHES MAXIMUM IN
  • Casehardening Indicator: CASEHARDENED
  • Material Document and Classification: FED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI 1020 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1020 ASSN STD SINGLE MATERIAL RESPONSE
  • FSC Application Data: ENGINE,GASOLINE,NONAIRCRAFT
  • Material: STEEL COMP 1020
  • Bore Diameter: 0.3750 INCHES NOMINAL IN
  • Countersink Angle in Deg: 30.0
Applications
  • Applications requiring Steel Comp 1020 construction
General Description

The Pin,piston, cataloged under National Stock Number 2805-00-275-3056, is classified within Federal Supply Class 2805 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Brinkley Technology Group Llc Dba Hercules Manufacturing. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN2805-00-275-3056
Primary Part Number58129B
Item NamePin,piston
FSC / FSG2805 / 28 — No Item Name Available
ManufacturerBrinkley Technology Group Llc Dba Hercules Manufacturing
StatusCANCELLED
Outside Diameter0.68630 INCHES MINIMUM AND 0.68720 INCHES MAXIMUM IN
Casehardening IndicatorCASEHARDENED
Material Document and ClassificationFED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI 1020 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1020 ASSN STD SINGLE MATERIAL RESPONSE
FSC Application DataENGINE,GASOLINE,NONAIRCRAFT
MaterialSTEEL COMP 1020
Bore Diameter0.3750 INCHES NOMINAL IN
Countersink Angle in Deg30.0
Radial Groove Radius0.156 INCHES NOMINAL IN
Body StyleCHAMFERED ENDS W/RADIAL SLOT
End Chamfer Angle in Deg30.0
Bore StyleINSIDE CHAMFER STRAIGHT-THRU BORE
Groove Depth0.0682 INCHES NOMINAL IN
Distance From End to Slot Center1.156 INCHES MINIMUM AND 1.172 INCHES MAXIMUM IN
Metallic Hardness Rating51.0 MINIMUM ROCKWELL C AND 62.0 MAXIMUM ROCKWELL C
Body Length2.3125 INCHES MINIMUM AND 2.3281 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 5
2530-00-920-563517659 INTERCHANGEABLE
Cylinder Assembly,hydraulic Brak
Sears, Roebuck and Co. Dba Sears Div Sears Commercial
5120-01-364-099236-100 INTERCHANGEABLE
Screwdriver,cross Tip
Jensen Tools, Inc.
3455-01-397-675936100 INTERCHANGEABLE
Cutter,milling,end
Niagara Cutter Inc
5905-01-444-088936100 INTERCHANGEABLE
Resistor,variable,wire Wound,non
Signet Scientific Co
7045-01-560-156536100 INTERCHANGEABLE
Applicator,disposable Electronic
Solon Manufacturing Company
Cross-Reference Index
Part NumberManufacturer
58129BSTD Hercules Engine Co Inc (USA)
58129B PRIMARY Brinkley Technology Group Llc Dba Hercules Manufacturing (USA)
58129BSTD Brinkley Technology Group Llc Dba Hercules Manufacturing (USA)
58129B Hercules Engine Co Inc (USA)
36100 John Deer Consumer Products Inc (USA)
Related Parts
2530-00-920-5635INTERCHANGEABLE
CYLINDER ASSEMBLY,HYDRAULIC BRAK
17659
5120-01-364-0992INTERCHANGEABLE
SCREWDRIVER,CROSS TIP
36-100
3455-01-397-6759INTERCHANGEABLE
CUTTER,MILLING,END
36100
5905-01-444-0889INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
36100
7045-01-560-1565INTERCHANGEABLE
APPLICATOR,DISPOSABLE ELECTRONIC
36100

Frequently Asked Questions

What is NSN 2805-00-275-3056?

NSN 2805-00-275-3056 is a Pin,piston, manufactured by Brinkley Technology Group Llc Dba Hercules Manufacturing, classified under FSC 2805 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 2805-00-275-3056?

NSN 2805-00-275-3056 has 5 cross-referenced part numbers: 58129BSTD (Hercules Engine Co Inc), 58129B (Brinkley Technology Group Llc Dba Hercules Manufacturing), 58129BSTD (Brinkley Technology Group Llc Dba Hercules Manufacturing), 58129B (Hercules Engine Co Inc), 36100 (John Deer Consumer Products Inc).

What NSN replaces 2805-00-275-3056?

There are 5 known substitutes for 2805-00-275-3056: 2530-00-920-5635, 5120-01-364-0992, 3455-01-397-6759 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 58129B?

Key specifications for 58129B: Outside Diameter: 0.68630 INCHES MINIMUM AND 0.68720 INCHES MAXIMUM IN; Casehardening Indicator: CASEHARDENED; Material Document and Classification: FED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI 1020 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1020 ASSN STD SINGLE MATERIAL RESPONSE; FSC Application Data: ENGINE,GASOLINE,NONAIRCRAFT. 15 total characteristics are documented in the Federal Logistics Information System.

Is NSN 2805-00-275-3056 still in active supply?

NSN 2805-00-275-3056 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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