PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3391Nut,plain,single Ball Seat,hexag

Alter Harry Co the Div of T E C · NSN 5310-00-252-5498 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-252-5498 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-252-5498. Primary manufacturer part number: 3391.
Features
  • Nut,plain,single Ball Seat,hexag — FSC 5310
  • Thread Series: UNF
  • Thread Quantity Per Inch: 20
  • Nominal Thread Size: 0.438 INCHES IN
  • Ball Seat Radius: 0.265 INCHES NOMINAL IN
  • Material: COPPER ALLOY OVERALL
  • Thread Class: 2B
  • Nut Height: 0.545 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Alloy Overall construction
General Description

The Nut,plain,single Ball Seat,hexag, cataloged under National Stock Number 5310-00-252-5498, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Alter Harry Co the Div of T E C. 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-252-5498
Primary Part Number3391
Item NameNut,plain,single Ball Seat,hexag
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerAlter Harry Co the Div of T E C
StatusACTIVE
Thread SeriesUNF
Thread Quantity Per Inch20
Nominal Thread Size0.438 INCHES IN
Ball Seat Radius0.265 INCHES NOMINAL IN
MaterialCOPPER ALLOY OVERALL
Thread Class2B
Nut Height0.545 INCHES NOMINAL IN
Nut StyleSINGLE BALL SEAT, HEXAGON
Thread DirectionRIGHT-HAND
Width Across Flats0.578 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5985-00-111-3503GT817U1 INTERCHANGEABLE
Dummy Load,electrical
Northrop Grumman Systems Corporation
4730-00-196-2059A733S-121CFB INTERCHANGEABLE
Nipple,pipe
American Society for Testing and Materials Dba Astm International
6685-00-479-9305CA030124 INTERCHANGEABLE
Thermostat,flow Control
Evans Tempcon Michigan, Llc
2520-00-499-8854203391 INTERCHANGEABLE
Gear
Clark Material Handling Company
9390-00-555-8865 INTERCHANGEABLE
Nonmetallic Special Shaped Secti
2990-00-569-07843391 INTERCHANGEABLE
Sleeve,sliding,clut
Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic
5950-00-648-67773391 INTERCHANGEABLE
Transformer,power
Precision Electronics, Inc
5998-00-828-9153 INTERCHANGEABLE
Circuit Card Assembly
5930-00-912-7519 INTERCHANGEABLE
Switch,push
5975-00-976-48483391 INTERCHANGEABLE
Plate,wall,electrical
Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division
Cross-Reference Index
Part NumberManufacturer
3391 PRIMARY Alter Harry Co the Div of T E C (USA)
Related Parts
5985-00-111-3503INTERCHANGEABLE
DUMMY LOAD,ELECTRICAL
GT817U1
4730-00-196-2059INTERCHANGEABLE
NIPPLE,PIPE
A733S-121CFB
6685-00-479-9305INTERCHANGEABLE
THERMOSTAT,FLOW CONTROL
CA030124
2520-00-499-8854INTERCHANGEABLE
GEAR
203391
9390-00-555-8865INTERCHANGEABLE
NONMETALLIC SPECIAL SHAPED SECTI
2990-00-569-0784INTERCHANGEABLE
SLEEVE,SLIDING,CLUT
3391
5950-00-648-6777INTERCHANGEABLE
TRANSFORMER,POWER
3391
5998-00-828-9153INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
5930-00-912-7519INTERCHANGEABLE
SWITCH,PUSH
5975-00-976-4848INTERCHANGEABLE
PLATE,WALL,ELECTRICAL
3391
5310-01-024-4837INTERCHANGEABLE
WASHER,SPRING TENSION
3391
5310-01-113-3549INTERCHANGEABLE
NUT,SEAT
3391

Frequently Asked Questions

What is NSN 5310-00-252-5498?

NSN 5310-00-252-5498 is a Nut,plain,single Ball Seat,hexag, manufactured by Alter Harry Co the Div of T E C, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-252-5498?

NSN 5310-00-252-5498 has 1 cross-referenced part number: 3391 (Alter Harry Co the Div of T E C).

What NSN replaces 5310-00-252-5498?

There are 12 known substitutes for 5310-00-252-5498: 5985-00-111-3503, 4730-00-196-2059, 6685-00-479-9305 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3391?

Key specifications for 3391: Thread Series: UNF; Thread Quantity Per Inch: 20; Nominal Thread Size: 0.438 INCHES IN; Ball Seat Radius: 0.265 INCHES NOMINAL IN. 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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