MS17830E
REQUIREMENTS:
1. MATERIAL:
LOCKNUT: CORROSION RESISTANT STEEL, ALLOYS UNS S30300, S30323, S30400, OR S30430, MATERIAL CONDITION COLD WORKED (CW) IN ACCORDANCE WITH ASTM A493, ASTM A581, ASTM A582, AMS 5640 OR QQ-S-763. CORROSION RESISTANT STEEL, ALLOY UNS S31600, MATERIAL CONDITION COLD WORKED (CW) IN ACCORDANCE WITH ASTM A 479, ASTM A493, OR AMS 5648.
NON METALLIC LOCKING COLLAR (INSERT) SHALL BE IN ACCORDANCE WITH ASTM D4066, GROUP 1, CLASS 1 OR 2 FOR
250 F, OR MIL-R-46198, TYPE 1 FOR 450 F, AS SPECIFIED IN PART NUMBER.
2. LOCKING DEVICE: THE LOCKING DEVICE SHALL BE A COLLAR INSERT CAPABLE OF COMPLETE CIRCUMFERENTIAL THREAD ENGAGEMENT FOR AT LEAST ONE FULL THREAD.
3. THREADS: THREADS SHALL BE RIGHT HAND UNJ, UNJC OR UNJF CLASS 3B IN ACCORDANCE WITH ASME B1.15. THREAD ACCEPTABILITY SHALL BE IN ACCORDANCE WITH ASME B1.3, SYSTEM 21.
4. BOLTS OR STUDS: BOLTS OR STUDS FOR MAXIMUM LOCKING TORQUE AND MINIMUM BREAKAWAY TORQUE TEST SHALL BE CORROSION RESISTANT STEEL.
5. SURFACE TREATMENT: PASSIVATE IN ACCORDANCE WITH ASTM A967.
6. SURFACE TEXTURE: SHALL BE Ra 125 MICROINCHES MAXIMUM IN ACCORDANCE WITH ASME B46.1.
7. MARKING: LOCKNUTS .2500 AND LARGER SHALL BE MARKED ON THE WRENCH FLAT AS INDICATED BELOW. LOCKNUTS
.2160 AND SMALLER SHALL BE MARKED ON PACKAGE. LOCKNUTS OF NOMINAL THREAD SIZE .2500 AND LARGER SHALL HAVE MATERIAL MARKING AS FOLLOWS:
UNS NUMBER |
MARKING 250 F |
MARKING 450 F |
S30300 |
303 |
303V |
S30323 |
303Se |
303SeV |
S30400 |
304 |
304V |
S30430 |
30430 |
30430V |
S31600 |
316 |
316V |
8. PART NUMBER: THE PART NUMBER SHALL CONSIST OF THE BASIC DOCUMENT NUMBER FOLLOWED BY A DASH NUMBER FROM TABLE I. ADD CODE "V" IN LIEU OF DASH TO INDICATE 450 F LOCKING FEATURE. ADD CODE "316" SUFFIX TO PART NUMBER TO INDICATE 316 STAINLESS STEEL. SEE EXAMPLES BELOW:
EXAMPLE: MS17830 X XXX 316
NO SUFFIX INDICATES TYPE 303, 304 STAINLESS (SEE REQUIREMENT 1)
316 SUFFIX INDICATES TYPE 316 STAINLESS
DASH NUMBER FROM TABLE I
"-" INDICATES 250 F LOCKING FEATURE "V" INDICATES 450 F LOCKING FEATURE
BASIC DOCUMENT NUMBER
MS17830-4C = = .250 NOMINAL THREAD SIZE, COARSE 3B THREAD STAINLESS STEEL, 250 F RATED LOCKING FEATURE. MS17830V4C = .250 NOMINAL THREAD SIZE, COARSE 3B THREAD STAINLESS STEEL, 450 F RATED LOCKING FEATURE. MS17830-4C316 = .250 NOMINAL THREAD SIZE, COARSE 3B THREAD STAINLESS STEEL TYPE 316, 250 F RATED
LOCKING FEATURE.
MS17830V4C316 = .250 NOMINAL THREAD SIZE, COARSE 3B THREAD STAINLESS STEEL TYPE 316, 450 F RATED LOCKING FEATURE
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