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330-18 — SHIELD,SONAR TRANSDUCER HEAD

✓ Government record, cited
Trefl · NUT WASHER
PRODUCT OVERVIEW

330-18: SHIELD,SONAR TRANSDUCER HEAD.

The SHIELD,SONAR TRANSDUCER HEAD is a Trefl industrial component. Key specifications include width: 0.500 INCHES NOMINAL IN, length: 6.000 INCHES IN, material: STEEL, nut_style: CASTELLATED, HEXAGON, body_style: STRAIGHT HANDLE, leg_length: 4.190 INCHES MINIMUM AND 15.840 INCHES MAXIMUM FIRST END IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-176-8090, 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
330-18
NSN: 5310-00-176-8090
NIINs: 001768090, 004793097, 005811385, 010241660, 013622953, 013657915, 013684512, 014243371, 014741811, 015278804, 015843328, 016159917, 016445260
FSC: 5310 — Nuts and Washers
CAGE: 80049 — DEPARTMENT OF THE AIR FORCE (USA)
SPECIFICATIONS
width0.500 INCHES NOMINAL IN
length6.000 INCHES IN
materialSTEEL
nut_styleCASTELLATED, HEXAGON
body_styleSTRAIGHT HANDLE
leg_length4.190 INCHES MINIMUM AND 15.840 INCHES MAXIMUM FIRST END IN
nut_height1.173 INCHES NOMINAL IN
body_length1.000 INCHES NOMINAL IN
finger_typeSPLIT END SINGLE FINGER
tapered_endNOT INCLUDED
beveled_edgeNOT INCLUDED
thread_class2B
NSN5310-00-176-8090
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 330-18 · Trefl ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WIDTH ACROSS FLATS: 1.687 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.125 INCHES IN
•
NONDEFINITIVE SPEC/STD DATA: A TYPE AND 4 GRADE
•
NUT HEIGHT: 1.173 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM AND ZINC OVERALL
•
NUT STYLE: CASTELLATED, HEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.687 INCHES NOMINAL IN
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.125 INCHES IN
NONDEFINITIVE SPEC/STD DATAA TYPE AND 4 GRADE
NUT HEIGHT1.173 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM AND ZINC OVERALL
NUT STYLECASTELLATED, HEXAGON
THREAD CLASS2B
THREAD QUANTITY PER INCH12
SUBSTITUTES & CROSS-REFERENCES 2
FFB571TYPEA4Reference document
Same NSN cross-reference
Reference document — Identification reference
USAF330-18Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 330-18?
330-18 is a SHIELD,SONAR TRANSDUCER HEAD manufactured by Trefl.
What parts can replace 330-18?
There are 2 known substitutes for 330-18: FFB571TYPEA4, USAF330-18. Substitute compatibility should be verified for your specific system.
What is the NSN for 330-18?
330-18 is cataloged in the U.S. Government catalog under NSN 5310-00-176-8090. This indicates validated use in U.S. government and defense supply chains.
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