PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

121-6-37Washer,flat

Zf Industrieantriebe Witten Gmbh · NSN 5310-01-096-6181 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-096-6181 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-096-6181. Primary manufacturer part number: 121-6-37.
Features
  • Washer,flat — FSC 5310
  • Cross-Sectional Shape Style: RECTANGULAR
  • Hardness Rating: 94.0 ROCKWELL B NOMINAL
  • Overall Diameter: 0.440 INCHES NOMINAL IN
  • Center Hole Shape Style: ROUND
  • Surface Treatment Document and Classification: MIL-F-14072 E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Surface Treatment: PASSIVATE OVERALL
  • Thickness: 0.008 INCHES MINIMUM AND 0.012 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-01-096-6181, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Zf Industrieantriebe Witten Gmbh. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-096-6181
Primary Part Number121-6-37
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerZf Industrieantriebe Witten Gmbh
StatusACTIVE
Cross-Sectional Shape StyleRECTANGULAR
Hardness Rating94.0 ROCKWELL B NOMINAL
Overall Diameter0.440 INCHES NOMINAL IN
Center Hole Shape StyleROUND
Surface Treatment Document and ClassificationMIL-F-14072 E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
Surface TreatmentPASSIVATE OVERALL
Thickness0.008 INCHES MINIMUM AND 0.012 INCHES MAXIMUM IN
MaterialSTEEL CORROSION RESISTING OVERALL
Material Document and ClassificationQQ-S-766 CLASS 304,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Peripheral Shape StyleROUND
Hole Diameter0.255 INCHES MINIMUM AND 0.259 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5310-00-012-1637 INTERCHANGEABLE
Washer,lock
Cross-Reference Index
Part NumberManufacturer
121-6-37 Zf Industrieantriebe Witten Gmbh (DEU)
1362355G1 Itt Industries Inc Itt Aerospace Communications Div East (USA)
1362355G1 L3harris Technologies, Inc. Dba Harris Corporation (USA)
Related Parts
5310-00-012-1637INTERCHANGEABLE
WASHER,LOCK

Frequently Asked Questions

What is NSN 5310-01-096-6181?

NSN 5310-01-096-6181 is a Washer,flat, manufactured by Zf Industrieantriebe Witten Gmbh, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-096-6181?

NSN 5310-01-096-6181 has 3 cross-referenced part numbers: 121-6-37 (Zf Industrieantriebe Witten Gmbh), 1362355G1 (Itt Industries Inc Itt Aerospace Communications Div East), 1362355G1 (L3harris Technologies, Inc. Dba Harris Corporation).

What NSN replaces 5310-01-096-6181?

There is 1 known substitute for 5310-01-096-6181: 5310-00-012-1637. Verify interchangeability with system specifications before substitution.

What are the specifications of 121-6-37?

Key specifications for 121-6-37: Cross-Sectional Shape Style: RECTANGULAR; Hardness Rating: 94.0 ROCKWELL B NOMINAL; Overall Diameter: 0.440 INCHES NOMINAL IN; Center Hole Shape Style: ROUND. 11 total characteristics are documented in the Federal Logistics Information System.

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