PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-DTL-1222 TYPE IIIL1Nut,plain,hexagon

Naval Inventory Control Point Mechanicsburg · NSN 5310-01-347-4302 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-347-4302 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-347-4302. Primary manufacturer part number: MIL-DTL-1222 TYPE IIIL1.
Features
  • Nut,plain,hexagon — FSC 5310
  • Thread Class: 3B
  • Thread Quantity Per Inch: 8
  • Nominal Thread Size: 1.250 INCHES IN
  • Criticality Code Justification: ZZZW
  • Thread Direction: RIGHT-HAND
  • Departure From Cited Document: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
  • Thread Series: UN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-347-4302, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 12 commercial cross-references from 3 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
NSN5310-01-347-4302
Primary Part NumberMIL-DTL-1222 TYPE IIIL1
Item NameNut,plain,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerNaval Inventory Control Point Mechanicsburg
StatusACTIVE
Thread Class3B
Thread Quantity Per Inch8
Nominal Thread Size1.250 INCHES IN
Criticality Code JustificationZZZW
Thread DirectionRIGHT-HAND
Departure From Cited DocumentMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
Thread SeriesUN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5310-00-935-1255 INTERCHANGEABLE
Nut,plain,hexagon
5305-01-065-8335 INTERCHANGEABLE
Screw,cap,hexagon Head
5310-01-207-4732 INTERCHANGEABLE
Nut,plain,hexagon
5305-01-226-0114 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-01-265-3777 INTERCHANGEABLE
Screw,cap,hexagon Head
5307-01-266-6273 INTERCHANGEABLE
Stud,continuous Thread
5305-01-290-0006 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-01-290-0016 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-01-290-0019 INTERCHANGEABLE
Screw,cap,hexagon Head
5305-01-302-5219 INTERCHANGEABLE
Screw,cap,socket Head
Cross-Reference Index
Part NumberManufacturer
MIL-DTL-1222 TYPE IIIL1 Naval Inventory Control Point Mechanicsburg (USA)
1 1/4-8UN-3BL1 Naval Inventory Control Point Mechanicsburg (USA)
MIL-DTL-1222TYIII GR400 QQ-N-2L1 Naval Inventory Control Point Mechanicsburg (USA)
1 1/4-8UN-3B Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
QQ-N-281 GRADE 400 CLASS A Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
1/4-8UN-3B CLASTYAL1 Naval Inventory Control Point Mechanicsburg (USA)
MIL-DTL-1222 TYPE III Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
1/4-8UN-3B CLASTYA Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-1222TYIII GR400 QQ-N-2 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
QQ-N-281 GRADE 400 CLASS AL1 Naval Inventory Control Point Mechanicsburg (USA)
CW-2300CW PIECE 612L1 Naval Inventory Control Point Mechanicsburg (USA)
CW-2300CW PIECE 612 DC Fabricators Inc (USA)
Related Parts
5310-00-935-1255INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5305-01-065-8335INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5310-01-207-4732INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5305-01-226-0114INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-01-265-3777INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5307-01-266-6273INTERCHANGEABLE
STUD,CONTINUOUS THREAD
5305-01-290-0006INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-01-290-0016INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-01-290-0019INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-01-302-5219INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
5305-01-302-5220INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
5305-01-302-5223INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD

Frequently Asked Questions

What is NSN 5310-01-347-4302?

NSN 5310-01-347-4302 is a Nut,plain,hexagon, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-347-4302?

NSN 5310-01-347-4302 has 12 cross-referenced part numbers: MIL-DTL-1222 TYPE IIIL1 (Naval Inventory Control Point Mechanicsburg), 1 1/4-8UN-3BL1 (Naval Inventory Control Point Mechanicsburg), MIL-DTL-1222TYIII GR400 QQ-N-2L1 (Naval Inventory Control Point Mechanicsburg), 1 1/4-8UN-3B (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), QQ-N-281 GRADE 400 CLASS A (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 7 more.

What NSN replaces 5310-01-347-4302?

There are 12 known substitutes for 5310-01-347-4302: 5310-00-935-1255, 5305-01-065-8335, 5310-01-207-4732 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-DTL-1222 TYPE IIIL1?

Key specifications for MIL-DTL-1222 TYPE IIIL1: Thread Class: 3B; Thread Quantity Per Inch: 8; Nominal Thread Size: 1.250 INCHES IN; Criticality Code Justification: ZZZW. 7 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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