PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21125Nut,plain,hexagon

Industrial Technologies and Services Llc · NSN 5310-00-006-8172 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-006-8172 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-006-8172. Primary manufacturer part number: 21125.
Features
  • Nut,plain,hexagon — FSC 5310
  • Thread Series: UNF
  • Nominal Thread Size: 0.438 INCHES IN
  • Thread Quantity Per Inch: 20
  • Bearing Surface Type: CHAMFERED
  • Nut Style: HEXAGON
  • Thread Class: 2B
  • Material: COPPER ALLOY OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Alloy Overall construction
General Description

The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-006-8172, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Industrial Technologies and Services Llc. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-006-8172
Primary Part Number21125
Item NameNut,plain,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerIndustrial Technologies and Services Llc
StatusACTIVE
Thread SeriesUNF
Nominal Thread Size0.438 INCHES IN
Thread Quantity Per Inch20
Bearing Surface TypeCHAMFERED
Nut StyleHEXAGON
Thread Class2B
MaterialCOPPER ALLOY OVERALL
Thread DirectionRIGHT-HAND
Width Across Flats0.616 INCHES NOMINAL IN
Nut Height0.373 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
4920-01-019-99433-7019 INTERCHANGEABLE
Barrel,pump,valve
Chapin R E Mfg Works Inc
5310-01-212-601321125 INTERCHANGEABLE
Nut Check
Parker Hannifin Corporation Div Hydraulic Systems Division
4320-01-408-7254D-5081-65-2482 INTERCHANGEABLE
Seal Assembly,shaft,spring Loade
Buffaloes Fire Pump Inc. Dba R B Pump Co
4810-01-414-806021125-002 INTERCHANGEABLE
Valve,linear,directional Control
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-415-385121125-1003-1 INTERCHANGEABLE
Alignment,rod
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4810-01-415-735221125-1001-1 INTERCHANGEABLE
Plunger,actuator
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Cross-Reference Index
Part NumberManufacturer
21125 PRIMARY Industrial Technologies and Services Llc (USA)
Related Parts
4920-01-019-9943INTERCHANGEABLE
BARREL,PUMP,VALVE
3-7019
5310-01-212-6013INTERCHANGEABLE
NUT CHECK
21125
4320-01-408-7254INTERCHANGEABLE
SEAL ASSEMBLY,SHAFT,SPRING LOADE
D-5081-65-2482
4810-01-414-8060INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
21125-002
4820-01-415-3851INTERCHANGEABLE
ALIGNMENT,ROD
21125-1003-1
4810-01-415-7352INTERCHANGEABLE
PLUNGER,ACTUATOR
21125-1001-1

Frequently Asked Questions

What is NSN 5310-00-006-8172?

NSN 5310-00-006-8172 is a Nut,plain,hexagon, manufactured by Industrial Technologies and Services Llc, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-006-8172?

NSN 5310-00-006-8172 has 1 cross-referenced part number: 21125 (Industrial Technologies and Services Llc).

What NSN replaces 5310-00-006-8172?

There are 6 known substitutes for 5310-00-006-8172: 4920-01-019-9943, 5310-01-212-6013, 4320-01-408-7254 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21125?

Key specifications for 21125: Thread Series: UNF; Nominal Thread Size: 0.438 INCHES IN; Thread Quantity Per Inch: 20; Bearing Surface Type: CHAMFERED. 10 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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