PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4251Nut,plain,castellated,hexagon

Fwd Seagrave Holdings Lp · NSN 5310-00-010-3046 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-010-3046 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-010-3046. Primary manufacturer part number: 4251.
Features
  • Nut,plain,castellated,hexagon — FSC 5310
  • Nominal Thread Size: 0.438 INCHES IN
  • Bearing Surface Type: CHAMFERED OR WASHER FACED
  • Nut Height: 0.444 INCHES MINIMUM AND 0.463 INCHES MAXIMUM IN
  • Nondefinitive Spec/std Data: A TYPE
  • Thread Direction: RIGHT-HAND
  • Material: STEEL OVERALL
  • Width Across Flats: 0.612 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Nut,plain,castellated,hexagon, cataloged under National Stock Number 5310-00-010-3046, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Fwd Seagrave Holdings Lp. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-010-3046
Primary Part Number4251
Item NameNut,plain,castellated,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerFwd Seagrave Holdings Lp
StatusACTIVE
Nominal Thread Size0.438 INCHES IN
Bearing Surface TypeCHAMFERED OR WASHER FACED
Nut Height0.444 INCHES MINIMUM AND 0.463 INCHES MAXIMUM IN
Nondefinitive Spec/std DataA TYPE
Thread DirectionRIGHT-HAND
MaterialSTEEL OVERALL
Width Across Flats0.612 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
Thread Quantity Per Inch20
Nut StyleCASTELLATED, HEXAGON
Thread Class2B
Thread SeriesUNF
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5975-00-280-9215LMF90-75 INTERCHANGEABLE
Elbow,electrical Conduit
Egs Electrical Group Appleton Div
2520-00-350-262220-30142 INTERCHANGEABLE
Universal Joint,vehicular
Mayo Company Inc. Dba Dragon Equipment
5330-00-351-6835QD604A INTERCHANGEABLE
Gasket
Wisconsin Motors, Llc
7510-00-473-9855425-1 INTERCHANGEABLE
Tape,pressure Sensitive Adhesive
Tapesouth Inc Dba Tapesouth Inc
6625-00-504-5711425-1 INTERCHANGEABLE
Detecting Element,directional Co
Bird Electronic Corporation Div Bird Electronic Corp
5340-00-514-6269361-107 INTERCHANGEABLE
Mount,resilient,utility
Jaidinger Manufacturing Co Inc Dba Jaidinger Manufacturing Co Inc
5975-00-846-4622 INTERCHANGEABLE
Mounting Base,electrical Equipme
3040-01-035-99644251 INTERCHANGEABLE
Bracket,eye,nonrotating Shaft
Pdi Ground Support Systems, Inc.
5975-01-067-91344251 INTERCHANGEABLE
Cabinet,electrical Equipment
Data General Corporation
5935-01-073-163816-01310-002 INTERCHANGEABLE
Connector,receptacle,electrical
Raytheon Company
Cross-Reference Index
Part NumberManufacturer
103046 General Motors Llc Dba General Motors Llc (USA)
4251 PRIMARY Fwd Seagrave Holdings Lp (USA)
103046 General Motors Corp (USA)
FFB571TYPEA Federal Specifications Promulgated by General Services Administration Washington DC (USA)
DX591A Diamond Reo Truck Co (USA)
N13311H Diamond Reo Truck Co (USA)
Related Parts
5975-00-280-9215INTERCHANGEABLE
ELBOW,ELECTRICAL CONDUIT
LMF90-75
2520-00-350-2622INTERCHANGEABLE
UNIVERSAL JOINT,VEHICULAR
20-30142
5330-00-351-6835INTERCHANGEABLE
GASKET
QD604A
7510-00-473-9855INTERCHANGEABLE
TAPE,PRESSURE SENSITIVE ADHESIVE
425-1
6625-00-504-5711INTERCHANGEABLE
DETECTING ELEMENT,DIRECTIONAL CO
425-1
5340-00-514-6269INTERCHANGEABLE
MOUNT,RESILIENT,UTILITY
361-107
5975-00-846-4622INTERCHANGEABLE
MOUNTING BASE,ELECTRICAL EQUIPME
3040-01-035-9964INTERCHANGEABLE
BRACKET,EYE,NONROTATING SHAFT
4251
5975-01-067-9134INTERCHANGEABLE
CABINET,ELECTRICAL EQUIPMENT
4251
5935-01-073-1638INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
16-01310-002
4730-01-097-5971INTERCHANGEABLE
STRAINER ELEMENT,SEDIMENT
4251
5985-01-258-0735INTERCHANGEABLE
ATTENUATOR,FIXED
425-1

Frequently Asked Questions

What is NSN 5310-00-010-3046?

NSN 5310-00-010-3046 is a Nut,plain,castellated,hexagon, manufactured by Fwd Seagrave Holdings Lp, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-010-3046?

NSN 5310-00-010-3046 has 6 cross-referenced part numbers: 103046 (General Motors Llc Dba General Motors Llc), 4251 (Fwd Seagrave Holdings Lp), 103046 (General Motors Corp), FFB571TYPEA (Federal Specifications Promulgated by General Services Administration Washington DC), DX591A (Diamond Reo Truck Co) and 1 more.

What NSN replaces 5310-00-010-3046?

There are 12 known substitutes for 5310-00-010-3046: 5975-00-280-9215, 2520-00-350-2622, 5330-00-351-6835 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4251?

Key specifications for 4251: Nominal Thread Size: 0.438 INCHES IN; Bearing Surface Type: CHAMFERED OR WASHER FACED; Nut Height: 0.444 INCHES MINIMUM AND 0.463 INCHES MAXIMUM IN; Nondefinitive Spec/std Data: A TYPE. 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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