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PartsTable / COMPONENT / ASTM-B348, GRADE T7L1
ASTM-B348, GRADE T7L1 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The ASTM-B348, GRADE T7L1 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-425-7874, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
ASTM-B348, GRADE T7L1
NSN: 5305-01-425-7874
FSC: 5305
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
Part NumberASTM-B348, GRADE T7L1
NSN5305-01-425-7874
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ASTM-B348, GRADE T7L1 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONFWD/AFT SEAL ASSY,MAIN PROP SHAFT
CRITICALITY CODE JUSTIFICATIONZZZY
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSQUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 34
803-5001003 PIECE NO. 156Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222 TYPE IIL1Interchangeable
interchangeable cross-reference
interchangeable
QQ-N-286 GRADE 500Interchangeable
interchangeable cross-reference
interchangeable
6405215 FN 17Interchangeable
interchangeable cross-reference
interchangeable
6405215 FN 17L1Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222 TYPE IIInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ASTM-B348, GRADE T7L1?
ASTM-B348, GRADE T7L1 is a ASTM-B348, GRADE T7L1.
What parts can replace ASTM-B348, GRADE T7L1?
There are 34 known substitutes for ASTM-B348, GRADE T7L1: 803-5001003 PIECE NO. 156, MIL-DTL-1222 TYPE IIL1, QQ-N-286 GRADE 500 and 31 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ASTM-B348, GRADE T7L1?
ASTM-B348, GRADE T7L1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-425-7874. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026