PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

28904-3Insert,screw Thread

Triumph Engine Control Systems Llc · NSN 5325-00-680-8746 · FSC 5325 · No Item Name Available
Verified by PartsTable
NSN 5325-00-680-8746 — this item is cataloged by the U.S. Government under National Stock Number 5325-00-680-8746. Primary manufacturer part number: 28904-3.
Features
  • Insert,screw Thread — FSC 5325
  • Style Designator: KEYLOCK
  • Material: STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 316 OVERALL
  • Material Document and Classification: MIK-S-7720 MIL SPEC ALL MATERIAL RESPONSES OVERALL
  • Length: 0.375 INCHES NOMINAL IN
  • Width Across Flats: 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
  • Top Portion Unthreaded Outside Length: 0.045 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
  • Insert Size: 0.375-16 UNC 3A A
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 303 or Steel Comp 303SE or Steel Comp 316 Overall construction
General Description

The Insert,screw Thread, cataloged under National Stock Number 5325-00-680-8746, is classified within Federal Supply Class 5325 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Triumph Engine Control Systems Llc. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5325-00-680-8746
Primary Part Number28904-3
Item NameInsert,screw Thread
FSC / FSG5325 / 53 — No Item Name Available
ManufacturerTriumph Engine Control Systems Llc
StatusACTIVE
Style DesignatorKEYLOCK
MaterialSTEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 316 OVERALL
Material Document and ClassificationMIK-S-7720 MIL SPEC ALL MATERIAL RESPONSES OVERALL
Length0.375 INCHES NOMINAL IN
Width Across Flats0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
Top Portion Unthreaded Outside Length0.045 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
Insert Size0.375-16 UNC 3A A
Top Unthreaded Portion Outside Diameter0.306 INCHES MINIMUM AND 0.311 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
4320-00-474-40832-890-43 INTERCHANGEABLE
Seal Assembly,shaft,spring Loade
Rexnord Industries, Llc Div Aerospace Solutions Downers Grove
5331-01-005-0512AS3209-176 INTERCHANGEABLE
O-Ring
Sae International Dba Sae International
4720-01-615-3468289043 INTERCHANGEABLE
Hose,metallic
Hobart Ground Power
Cross-Reference Index
Part NumberManufacturer
28904-3 Transupport Inc Dba Transupport Inc (USA)
28904-3 PRIMARY Triumph Engine Control Systems Llc (USA)
932A-4SE375 Howmet Global Fastening Systems Inc. Div Microdot Products (USA)
932A-4SE0375 Stanley Engineered Fastening Llc (USA)
Related Parts
4320-00-474-4083INTERCHANGEABLE
SEAL ASSEMBLY,SHAFT,SPRING LOADE
2-890-43
5331-01-005-0512INTERCHANGEABLE
O-RING
AS3209-176
4720-01-615-3468INTERCHANGEABLE
HOSE,METALLIC
289043

Frequently Asked Questions

What is NSN 5325-00-680-8746?

NSN 5325-00-680-8746 is a Insert,screw Thread, manufactured by Triumph Engine Control Systems Llc, classified under FSC 5325 (No Item Name Available). Status: active.

What are the part numbers for NSN 5325-00-680-8746?

NSN 5325-00-680-8746 has 4 cross-referenced part numbers: 28904-3 (Transupport Inc Dba Transupport Inc), 28904-3 (Triumph Engine Control Systems Llc), 932A-4SE375 (Howmet Global Fastening Systems Inc. Div Microdot Products), 932A-4SE0375 (Stanley Engineered Fastening Llc).

What NSN replaces 5325-00-680-8746?

There are 3 known substitutes for 5325-00-680-8746: 4320-00-474-4083, 5331-01-005-0512, 4720-01-615-3468. Verify interchangeability with system specifications before substitution.

What are the specifications of 28904-3?

Key specifications for 28904-3: Style Designator: KEYLOCK; Material: STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 316 OVERALL; Material Document and Classification: MIK-S-7720 MIL SPEC ALL MATERIAL RESPONSES OVERALL; Length: 0.375 INCHES NOMINAL IN. 8 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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